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Tue Dec 21 00:00:39 CET 2010 · https://mail.python.org/pipermail/python-dev/2010-December/106940.html

>> Do you have an example bug where this patch helps in finding the precise
>> location of a segfault?
> 
> How is 'line 29 in g' not more precise than 'Segmentation fault'?

I think Stefan is treating "precise location" as an absolute property,
not a relative one. The precise location would be the very instruction
causing the fault; this is something that a core dump provides, unless
a signal handler interferes with that.

In many crashes I fixed, the Python stack trace was irrelevant to
understand the nature of the crash. Of course, there were also counter-
examples where you'ld need the Python stack (or, rather, the entire
interpreter trace) to understand how the crashing case can occur in
the first place.

Regards,
Martin

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[Python-Dev] Issue #8863 adds a new PYTHONNOFAULTHANDLER?environment variable